Attic Fan Installation Instructions

Turn off the attic fan power line circuit breaker. Run a power wire from the nearest junction box to your attic fan installation location. Check with local building codes, and with the specifications of your particular fan model to ensure that the proper amperage is being delivered in the proper way. Use your screw gun and drywall screws to install a junction box to a vertical stud a few feet away from your fan location.

Place your attic fan shutter onto the attic wall where you plan to mount it. If you have any existing attic vents, place the fan in one of these openings to avoid cutting more holes. Trace the perimeter of the shutter onto the wall with your pencil. Use your tape measure and straight edge to make a second pencil line about 5/8 inch inside the first on all sides.

Make a hole at one corner of the pencil line using a drill, and cut along the inner line all the way around with a jigsaw. Remove the panel. Place the shutter into the hole you have cut for it, and use your level to check that it is plumb on the top, and on the sides.

Fasten the shutter to the attic wall using a screw gun and the screws supplied by your shutter manufacturer. Apply a bead of caulk around the entire edge of the shutter and allow it to dry according to the manufacturer's instructions.

Measure and cut two lengths of 2-by-4 inch lumber to bridge the gap between the studs on either side of your shutter location. Use your hammer and nails to fasten the 2-by-4s in place by driving nails through the outside edge of each stud, and into the ends of the cut pieces. These supports will serve at the framework for your attic fan mount. If there is an existing framework around your shutter opening, use this. If the existing framework had to be removed to enable you to make the shutter opening, reinstall it according to the new layout.

Hold your attic fan in front of the horizontal 2-by-4s you have installed, so that the fan mounting brackets align with the wood. Use your screw gun and the mounting screws provided to fasten the fan onto the wood.

Mount the thermostat junction box to the vertical stud below your fan using a screw gun. Extend the wiring from your electrical junction box to the thermostat box and connect the wiring according to the manufacturer's instructions.

Turn on the circuit breaker and test the fan. Set the thermostat according to the manufacturer's instructions.